Ventilator.



No. 793,015. PATENTED JUNE 20, 1905. G. MOULTON.

VENTILATOR.

APPLICATION FILED OUT. 9. 190a.

I) II N ll I! I) II I) UNTTED STATES Patented June 20, 1905.

GILMAN MOULTON, OF SOMERVILLIC, NASSAUIUSICTTS.

VENTILATOR.

SPECIFICATION forming part of Letters Patent No. 793,015, dated June 20, 1905.

Application tiled October 9, 1903. Seriai No, 176.432.

To 1/71 0111. if lH/ll/j/ (iv/Learn:

lie it known that I, GILMAN hiout'ri'n'. a citizen of the United States, residing at Somerville, in the county of Middlescx and State of Blassachusetts, have invented certain new and useful Improvements in Ventilators, of which the following is a specilication.

This invention relates to certain new and useful improvements in ventilating devices designed more particularly to be placed in the windows of apartments to admit fresh air therein.

The invention has for its object to provide means whereby fresh air may be thus admitted under mechanical direction and regulation and which will also automatically prevent high winds from forcing dirt or dust through the air-passages of the ventilator into the room.

The invention will be hereinafter fully set forth, and particularly pointed out in the claims.

In the accompanying drawings, Figure 1 is a perspective view of my improved ventilator applied to a window. Fig. 2 is a side elevation illustrating the inlet-opening. Fig. liisa top plan view; and Fig. a is a sectional view on line i 1, Fig. 3, looking to the left.

Referring to the drawings, 5 designates a suitable span-board adapted to extend across the lower part of a window and provided with end grooves 5, adapted to interlock wilh vertieal strips attached to the sides of the window-frame, whereby the ventilator is held in place, or, if desired, said board may be provided with deeper end cuts or grooves (3 7, into which may be litted tenons 8 f) of extension-pieces ll.) ll, the latter being provided with suitable grooves adapted to engage the vertical strips of the window-frame above mentioned. These extension-pieces are socnred to the main board after adjustment by means of strips 12 13, extending over the tops thereof, whereby the parts are connected and the spaces between them are covered when the extensions are drawn out. Saidstripsarc secured in position by any suitable means.

My improved ventilator is so arranged in the window that the lower sash of the latter, when raised and lowered, plays up and down behind the span board 5, as clearly illustrated in Fig. 1. Said board has an opening ltt, covered by a wire screen 15, secured to the inner face of the board. A deflecting-box is formed over this screened opening, said box having inwardly-projecting end pieces 1(3 17 secured to the face of the board near the ends of the opening l-t. The inner edges of these end pieces are formed to provide a curved or angular casing 18 when properly covered, the inner face of said casing serving to deflect the incoming current of air entering" through opening M and directing it through the outward openings in the top of the box.

The casing lb is provided with a groove 19, in which slides a lid 20, provided with av series of circular air-vents 21, said lid being held in place by means of a catch 22, pivot ally attached thereto and having its free ends turned into and out of an indentation 223 in the board \Vithin casing 18 is pivoted a shutter 2%, designed to exclude dirt or dust, said shutter having a preponderant or weighted side formed in any suitable manner, a weight 25, secured to one edge thereof, being illustrated in the drawings. By this arrangement the weighted portion of the shutter holds the latter normally open, and fresh air is freely admitted into the room through the ventilator. The weight of the shutter is so arranged, however, that a sudden gust of wind or an excessively-strong inward current powerful enough to overcome the prcpoiiderance of the weight will for the time close the same, thus automatically excluding the entrance of dirt and dust, which often accompany high winds. The position of shutter 52st may also be positively adjusted in a partially-closed position or wholly so by means of an arm 26, mounted to rotate in the end 1'7 and provided with a knob 2-7, whereby the same may be readily turned, said arm being provided. with a detent adapted to press against the upper side of shutter 2t and close the same against the influence of the weight 25. \Vhcn closed, the edges of the shutter will strike strips of felt 28 2), which serve to effect an air-tight closure of the passage.

The advantages of my improved ventilator will be at once apparent to those skilled in the art to which it appertains. It Will be particularly observed that the same may be readily applied to a Window or removed therefrom and any collection of dirt may be easily removed by uncovering the box and brushing it out. It Will also be observed that the volume of air entering said ventilator may be readily regulated and that sudden gusts of Wind are prevented from having any deleterious eifect Within the apartment.

I claim as my invention 1. A ventilator comprising a span-board having an opening therein, a deflecting box or casing supported by said board and provided With outlet-openings, a valvular shutter mounted in said box or casing and having a preponderant side, and means for positively adjusting said shutter.

2. A ventilator comprising a span-board having an opening therein, a deflecting box or casing supported by said board, a sliding top for said casing provided With outlet-openings, a shutter pivotally mounted insaid box or casing and having a preponderant side, and means for positively adjusting said shutter.

3. A ventilator comprising a span-board having an opening therein, a deflecting box or casing supported by said board and provided With outlet-openings, a valvular shutter mounted in said box or casing and having a preponderant side, and an arm mounted in said casing and provided with a detent adapted to engage said shutter.

4. A ventilator comprising a span-board having an opening therein, a deflecting box or casing supported by said board and provided With outlet-openings, a valvular shutter mounted in said box or casing and having a Weight secured to one side thereof, and adjusting means adapted to engage the opposite edge of said shutter.

5. A ventilator comprising a span-board having an opening therein, extension-pieces for said board, a deflecting box or easingsupported by said board and provided with outlet-openings, a valvular shutter mounted in said box or casing and having a preponderant side, and means for positively adjusting said shutter.

GILMAN MOULTON. Vitnesses:

EUGENE HUMPHREY, MAXWELL T. SMITH. 

